condition mean min max ZT0-3 0.4316935 0.227856 0.5803785 ZT4-7 0.838422 0.838422 0.838422 ZT8-11 0.2550765 0.2550765 0.2550765 ZT12-15 0.4251615 0.250949 0.5993740000000001 ZT16-19 0.4854675 0.4854675 0.4854675 ZT20-23 0.7016935 0.7016935 0.7016935